[VE][81] Error Message Feedback

I get the following 
Line 18, column 23: character ";" not allowed in attribute specification
list
for (i=0;i<rowlen;i++) {

Line 18, column 23: element "rowlen" undefined
for (i=0;i<rowlen;i++) {
You have used the element named above in your document, but the document
type you are using does not define an element of that name. This error is
often caused by incorrect use of the "Strict" document type with a document
that uses frames (e.g. you must use the "Frameset" document type to get the
"<frameset>" element), or by using vendor proprietary extensions such as
"<spacer>" or "<marquee>" (this is usually fixed by using CSS to achieve the
desired effect instead). 

Line 36, column 8: end tag for "rowlen" omitted, but OMITTAG NO was
specified
</script>


when using a javascript for loop within my strict XHTML 1.0 code.

How can I avoid this validation error?

Regards


Kevin May

Tel 	020 8311 7470
Mobile	07931 715341
e-mail	kevin.may@virgin.net